When BH 209 came out years ago, I was given a factory sample 8 lb. bottle. I used it in my inline MLs with excellent results. I could shoot all day without cleaning and velocities were phenomenal. So, I figured, why not try it in my 45-90 and 45-70. Again, I could shoot all day without cleaning and velocities were great. The trouble came with clean up. The company said do not use water, it will not work, and it will leave a gummy mess. So, I used their product, Ed's red, Hoppe's #9 etc. and the bore cleaned up really nice. The trouble came when I cleaned cases. I waited a few days to wet tumble the cases and when they finished their cycle, the cases were covered with a black, oily/sticky spooge that also grimed up my hands. I cleaned the tumbler, cleaned the media, use more soap and retumbled the cases. It took several cycles of this before the cases came out clean. I blamed the delay, not the BH 209. This went on for many years. It was intermittent because most of the time, I loaded BP and sometimes, I mixed BP fouled cases with BH 209 fouled cases. It just never occurred to me what was causing it. It didn't until Sunday last. I had a bunch of .45 Colt cases I had loaded with BH 209 to try in my new Schofield revolver. Without a pause, I dumped the dirty cases in my tumbler and added a dozen or so brass 12 ga hulls that had been fired using Longshot. Three hours later I opened the case to find the ugly black spooge coating everything. This is when the light came on. It was the reaction of the BH 209 residue with the water that made the mess. Duh! So, from now on, if I use BH 209, I'll clean the cases in mineral spirits first. Then wet tumble them. Figured I'd pass on this tidbit JIC anyone else was as slow as I am.